S
M
T
W
T
F
S
26
83°
61°
27
85°
59°
28
72°
65°
29
72°
64°
30
73°
59°
31
85°
59°
1
84°
57°
2
75°
67°
3
78°
55°
4
84°
52°
5
88°
52°
6
89°
67°
7
86°
67°
8
85°
67°
9
82°
61°
10
81°
60°
11
81°
58°
12
82°
55°
13
82°
58°
14
83°
54°
15
80°
58°
16
77°
67°
17
82°
58°
18
81°
55°
19
82°
59°
20
74°
50°
21
74°
52°
22
75°
53°
23
77°
56°
24
82°
58°
25
83°
60°
26
80°
62°
27
76°
59°
28
75°
50°
29
74°
52°
30
78°
58°
31
73°
50°
1
73°
50°
2
75°
56°
3
72°
57°
4
72°
57°
5
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Big Flats
Big Flats's August 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 50° and 67°. The average high for August is 77° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Big Flats. See also: September | October | November.